Logical Operators

• Double pipes || are preferred to OR

Incorrect:

    if($foo OR $bar) {...}

Correct:

    if($foo || $bar) {...}

• Double ampersand && is preferred to AND

Incorrect:

    if($foo AND $bar)

Correct:

    if($foo && $bar)

• No space should precede or proceed an exclamation point ! before a variable when checking for inverse

Incorrect:

    if( ! $foo)

Correct:

    if(!$foo)